package com.zl.learning.object.event;

public class Main {
    public static void main(String[] args) {
        TestA a = new TestA();
        TestA d = new TestA();
        System.out.println(a.equals(d));
        TestB b = new TestB(a);
        TestC c = new TestC(a);
        a.doChange();
    }
}
